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Cabaletta Bio (CABA) Short Interest Ratio & Short Volume

Cabaletta Bio logo
$1.58 -0.11 (-6.21%)
As of 11:33 AM Eastern
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Cabaletta Bio Short Interest Overview

As of September 30, 2026, Cabaletta Bio (CABA) had a short interest of 38.61 million shares sold short, representing 24.34% of the public float. This marks a 15.87% increase in short interest since the prior report. The short interest ratio (days to cover) is 6.3, meaning it would take 6.3 days of the average trading volume of 4.12 million shares to cover all short positions.

Current Short Interest
38,613,761 shares
Previous Short Interest
33,325,453 shares
Change Vs. Previous Month
15.87%
Dollar Volume Sold Short
$74.22 million
Short Interest Ratio
6.3 Days to Cover
Last Record Date
September 30, 2026
Outstanding Shares
169,540,000 shares
Short Percent of Float
24.34%
Today's Trading Volume
1,653,258 shares
Average Trading Volume
4,116,926 shares
Today's Volume Vs. Average
40%
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

CABA Short Interest Over Time

CABA Days to Cover Over Time

CABA Percentage of Float Shorted Over Time

Cabaletta Bio Tesla Short Interest History & Recent Changes

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Report DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date
9/30/202638,613,761 shares $74.22 million +15.9%24.3%6.3 $1.92
9/15/202633,325,453 shares $86.65 million -19.6%21.0%5.2 $2.60
8/31/202641,442,251 shares $128.89 million -3.2%26.1%8.35 $3.11
8/14/202642,795,914 shares $117.69 million +5.0%27.0%12.41 $2.75
7/31/202640,777,017 shares $109.28 million -0.6%26.7%18.45 $2.68
7/15/202641,009,848 shares $113.60 million +20.4%26.9%6.73 $2.77
6/30/202634,060,216 shares $105.93 million +29.8%22.3%4.33 $3.11
6/15/202626,240,080 shares $78.98 million +14.4%17.2%7.54 $3.01
5/29/202622,943,123 shares $86.73 million +0.4%15.0%7.6 $3.78
5/15/202622,843,626 shares $75.61 million +10.7%15.0%3.25 $3.31
4/30/202620,629,421 shares $61.68 million +5.0%19.8%10.08 $2.99
4/15/202619,641,197 shares $66.78 million -1.6%12.9%10.71 $3.40
3/31/202619,967,705 shares $53.71 million +4.9%13.1%9.82 $2.69
3/13/202619,042,497 shares $58.27 million +2.2%22.3%11.27 $3.06
2/27/202618,637,787 shares $61.88 million +0.1%12.2%5.93 $3.32
2/13/202618,625,317 shares $52.15 million -0.3%12.2%6.8 $2.80
1/30/202618,677,159 shares $48.00 million +1.3%21.9%2.94 $2.57
1/15/202618,438,877 shares $38.35 million -1.9%21.6%10.21 $2.08
12/31/202518,795,100 shares $41.16 million -0.8%22.0%11.03 $2.19
12/15/202518,948,919 shares $45.29 million +4.6%22.2%9.06 $2.39
11/28/202518,113,270 shares $46.46 million +11.8%21.2%7.1 $2.57
11/14/202516,196,450 shares $37.41 million +25.1%19.0%3.63 $2.31
10/31/202512,948,100 shares $46.74 million +15.4%16.0%2.38 $3.61
10/15/202511,220,000 shares $32.54 million +85.8%13.8%4.1 $2.90
9/30/20256,040,000 shares $14.13 million +8.4%N/A2.8 $2.34
9/15/20255,570,000 shares $10.64 million -4.3%N/A3.3 $1.91
8/31/20255,820,000 shares $8.44 million -7.8%7.2%3.2 $1.45
8/15/20256,310,000 shares $10.79 million +4.6%N/A3.5 $1.71
7/31/20256,030,000 shares $9.17 million -7.8%13.4%2.8 $1.52
7/15/20256,540,000 shares $10.66 million +16.6%N/A3.1 $1.63
6/30/20255,610,000 shares $8.53 million -13.3%12.5%2.7 $1.52
6/15/20256,470,000 shares $12.88 million +4.4%14.4%3.5 $1.99
5/31/20256,200,000 shares $11.59 million +12.3%14.1%4.4 $1.87
5/15/20255,520,000 shares $9.99 million -9.5%12.5%4.2 $1.81
4/30/20256,100,000 shares $8.05 million +5.2%N/A6.3 $1.32
4/15/20255,800,000 shares $6.50 million -5.4%13.2%5.5 $1.12
3/31/20256,130,000 shares $8.49 million -1.6%13.9%5.1 $1.39
3/15/20256,230,000 shares $11.34 million -7.8%14.1%5 $1.82
2/28/20256,760,000 shares $12.20 million +9.0%15.3%4.5 $1.81
2/15/20256,200,000 shares $16.80 million -0.8%14.1%2.5 $2.71
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1/31/20256,250,000 shares $14.94 million -3.1%N/A2.5 $2.39
1/15/20256,450,000 shares $14.32 million +7.1%N/A2.6 $2.22
12/31/20246,020,000 shares $13.67 million -3.2%N/A2.5 $2.27
12/15/20246,220,000 shares $17.54 million +38.2%N/A2.7 $2.82
11/30/20244,500,000 shares $17.19 million +25.0%N/A2 $3.82
11/15/20243,600,000 shares $10.91 million -3.0%N/A2.8 $3.03
10/31/20243,710,000 shares $13.17 million -1.9%N/A4 $3.55
10/15/20243,780,000 shares $16.37 million -29.0%N/A3.6 $4.33
9/30/20245,320,000 shares $25.11 million -16.7%N/A5.1 $4.72
9/15/20246,390,000 shares $26.26 million No ChangeN/A5.7 $4.11
8/31/20246,390,000 shares $35.98 million +1.8%N/A5.1 $5.63
8/15/20246,280,000 shares $28.01 million -28.4%N/A4.8 $4.46
7/31/20248,770,000 shares $62.27 million +16.8%N/A7.1 $7.10
7/15/20247,510,000 shares $58.65 million +4.6%N/A5.7 $7.81
6/30/20247,180,000 shares $53.71 million -24.0%N/A5.4 $7.48
6/15/20249,450,000 shares $100.74 million -0.2%N/A7.2 $10.66
5/31/20249,470,000 shares $96.50 million +4.1%N/A8.1 $10.19
5/15/20249,100,000 shares $115.48 million -11.2%N/A8.1 $12.69
4/30/202410,250,000 shares $109.11 million +3.9%N/A8.9 $10.65
4/15/20249,870,000 shares $159.70 million +16.1%N/A10.3 $16.18
3/31/20248,500,000 shares $145.01 million +19.9%N/A9 $17.06
3/15/20247,090,000 shares $132.87 million +1.1%N/A7.9 $18.74
2/29/20247,010,000 shares $160.39 million +2.6%N/A7.1 $22.88
2/15/20246,830,000 shares $163.24 million +6.9%N/A5.4 $23.90
1/31/20246,390,000 shares $130.87 million -0.5%N/A5 $20.48
1/15/20246,420,000 shares $136.10 million +3.2%N/A5.4 $21.20
12/31/20236,220,000 shares $141.19 million +10.5%N/A5.3 $22.70
12/15/20235,630,000 shares $115.70 million -0.7%N/A4.8 $20.55
11/30/20235,670,000 shares $91.00 million +12.1%N/A4.9 $16.05
11/15/20235,060,000 shares $87.89 million -19.4%N/A6.4 $17.37
10/31/20236,280,000 shares $89.55 million +1.5%N/A8.6 $14.26
10/15/20236,190,000 shares $94.83 million +19.3%N/A9.1 $15.32
9/30/20235,190,000 shares $78.99 million +65.3%N/A8 $15.22
9/15/20233,140,000 shares $49.64 million -3.7%N/A5 $15.81
8/31/20233,260,000 shares $46.16 million -39.2%N/A6 $14.16
8/15/20235,360,000 shares $73.27 million +6.1%N/A11.6 $13.67
7/31/20235,050,000 shares $68.78 million -8.4%N/A10.4 $13.62
7/15/20235,510,000 shares $66.73 million +4.8%N/A11 $12.11
6/30/20235,260,000 shares $67.91 million +22.3%N/A11.2 $12.91
6/15/20234,300,000 shares $55.34 million +7.0%N/A9.9 $12.87
5/31/20234,020,000 shares $40.56 million +1.0%N/A11.8 $10.09
5/15/20233,980,000 shares $45.69 million -0.5%N/A11 $11.48
4/30/20234,000,000 shares $41.52 million -1.0%N/A10.3 $10.38
4/15/20234,040,000 shares $31.55 million +9.8%N/A9.3 $7.81
3/31/20233,680,000 shares $30.43 million +3.1%N/A7.2 $8.27
3/15/20233,570,000 shares $26.45 million +2.6%N/A5.5 $7.41
2/28/20233,480,000 shares $30.76 million +3.0%N/A4.6 $8.84
2/15/20233,380,000 shares $27.21 million -0.3%N/A4.2 $8.05
1/31/20233,390,000 shares $41.32 million +3.7%N/A3.9 $12.19
1/15/20233,270,000 shares $32.77 million -7.4%N/A2.6 $10.02
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12/30/20223,530,000 shares $32.65 million -0.3%N/A2.6 $9.25
12/15/20223,540,000 shares $23.90 million -3.5%N/A2.7 $6.75
11/30/20223,670,000 shares $16.44 million +6.4%N/A2.8 $4.48
11/15/20223,450,000 shares $12.32 million -8.5%N/A2.3 $3.57
10/31/20223,770,000 shares $6.37 million +5.9%N/A1.9 $1.69
10/15/20223,560,000 shares $3.03 million -23.6%N/A1.8 $0.85
9/30/20224,660,000 shares $3.03 million +11.8%N/A3.5 $0.65
9/15/20224,170,000 shares $3.67 million +21.2%N/A3.2 $0.88
8/31/20223,440,000 shares $3.28 million +55.0%N/A2.8 $0.95
8/15/20222,220,000 shares $3.40 million +8.3%N/A2.4 $1.53
7/31/20222,050,000 shares $2.42 million +4.6%N/A11.3 $1.18
7/15/20221,960,000 shares $3.04 million +6.5%N/A12.2 $1.55
6/30/20221,840,000 shares $1.95 million +0.6%N/A11.4 $1.06
6/15/20221,830,000 shares $1.83 million +1.7%N/A12.2 $1.00
5/31/20221,800,000 shares $2.30 million -1.6%N/A11.2 $1.28
5/15/20221,830,000 shares $2.73 million +2.8%N/A10.3 $1.49
4/30/20221,780,000 shares $2.46 million No ChangeN/A10.1 $1.38
4/15/20221,780,000 shares $3.24 million -2.2%N/A10 $1.82
3/31/20221,820,000 shares $3.69 million No ChangeN/A11 $2.03
3/15/20221,820,000 shares $3.06 million +2.8%N/A8.7 $1.68
2/28/20221,770,000 shares $3.82 million No ChangeN/A3 $2.16
2/15/20221,770,000 shares $5.01 million -0.6%N/A3.1 $2.83
1/31/20221,780,000 shares $5.38 million -1.1%N/A3 $3.02
1/15/20221,800,000 shares $6.17 million -1.1%N/A3 $3.43
12/31/20211,820,000 shares $6.90 million -1.1%N/A3 $3.79
12/15/20211,840,000 shares $7.30 million +1.1%N/A3.1 $3.97
11/30/20211,820,000 shares $21.08 million +10.3%N/A11.1 $11.58
11/15/20211,650,000 shares $19.93 million +22.2%N/A8.1 $12.08
10/29/20211,350,000 shares $18.45 million No ChangeN/A7 $13.67
10/15/20211,350,000 shares $16.55 million No Change8.7%8 $12.26

CABA Short Interest - Frequently Asked Questions

Short interest is the volume of Cabaletta Bio shares that have been sold short but have not yet been closed out or covered. As of September 30th, investors have sold 38,613,761 shares of CABA short. 24.34% of Cabaletta Bio's shares are currently sold short. Learn More on Cabaletta Bio's current short interest.

The short interest ratio, also known as the "days to cover ratio", is calculated by dividing the number of shares of a stock sold short divided by its average trading volume. A short interest ratio ranging between 1 and 4 generally indicates strong positive sentiment about a stock and a lack of short sellers. A short interest ratio of 10 or greater indicates strong pessimism about a stock. CABA shares currently have a short interest ratio of 6.3. Learn More on Cabaletta Bio's short interest ratio.

Companies that have a short interest as a percentage of float below 10% indicates positive investor sentiment and few short sellers. Stocks with a short interest percentage above 10% is considered high, suggesting some investors are pessimistic about the stock. Companies with a short interest percentage of 20% or more indicates widespread negative sentiment. 24.34% of Cabaletta Bio's floating shares are currently sold short.

Cabaletta Bio saw a increase in short interest in the month of September. As of September 30th, there was short interest totaling 38,613,761 shares, an increase of 15.9% from the previous total of 33,325,453 shares. Changes in short volume can be used to identify positive and negative investor sentiment. Investors that short sell a stock are betting that its price will decline in the future. An increase in short sale volume suggests bearish (negative) sentiment among investors. A decrease on short sale volume suggests bullish (positive) sentiment.

24.34% of Cabaletta Bio's shares are currently sold short. Here is how the short interest of companies in the industry of "biotechnology" compare to Cabaletta Bio: Omeros Corporation (17.57%), Kailera Therapeutics, Inc. (6.70%), Nanobiotix S.A. - Sponsored ADR (0.30%), Damora Therapeutics, Inc. Common Stock (7.70%), Oric Pharmaceuticals, Inc. (16.69%), Replimune Group, Inc. (26.06%), MannKind Corporation (8.35%), Tyra Biosciences, Inc. (18.03%), First Tracks Biotherapeutics (14.53%), Bicara Therapeutics Inc. (18.75%),

As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($75.10 billion), Invesco QQQ ($52.12 billion), iShares Russell 2000 ETF ($25.28 billion), SPDR S&P Biotech ETF ($11.70 billion), Nebius Group N.V. ($10.54 billion), iShares iBoxx $ Investment Grade Corporate Bond ETF ($9.69 billion), iShares iBoxx $ High Yield Corporate Bond ETF ($9.22 billion), iShares 20+ Year Treasury Bond ETF ($8.80 billion), Financial Select Sector SPDR Fund ($7.65 billion), and Lumentum Holdings Inc. ($7.23 billion). View all of the most shorted stocks.

Short selling CABA is an investing strategy that aims to generate trading profit from Cabaletta Bio as its price is falling. CABA shares are trading down $0.08 today. To short a stock, an investor borrows shares, sells them and buys the shares back on the public market later to return it to the lender. Short sellers are betting that a stock will decline in price. If the stock does drop after selling, the short seller buys it back at a lower price and returns it to the lender. The difference between the sell price and the buy price is the trader's profit.

A short squeeze for Cabaletta Bio occurs when it has a large amount of short interest and its stock appreciates in price. This forces short sellers to cover their short interest positions by buying actual shares of CABA, which in turn drives the price of the stock up even further.

Short interest is typically published by a stock exchange once per month. However, NASDAQ publishes a report for U.S. stocks, including CABA, twice per month. The most recent reporting period available is September, 30 2026.

Understanding short interest metrics can help you assess how traders are positioning around a stock like CABA:

  • Shares Sold Short: The total number of shares that have been sold by short sellers but have not yet been covered or closed out. A high number may indicate bearish sentiment.
  • Short Float: The percentage of a company’s publicly available shares (or "float") that are sold short. A higher short float suggests a greater portion of the stock is being bet against.
  • Days to Cover (Short Interest Ratio): This estimates how many days it would take short sellers to cover their positions, based on average daily trading volume. Higher values can signal potential for a short squeeze if buying pressure increases.

These metrics are often used by traders to gauge sentiment, volatility risk, and the potential for price movements based on short covering activity.


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Short Interest Tools

Short interest data for NASDAQ:CABA is sourced from the Financial Industry Regulatory Authority (FINRA), with the most recent report published on 10/9/2026. FINRA publishes updated short interest twice a month.
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